PHYS 1401 Module Two Exam1. A spaceship is observed traveling in the positive x direction with a speed of 150 m/s when it begins accelerating at a constant rate. The spaceship is observed 25 s later traveling with an instantaneous velocity of 1500 m/s at an angle of 55o above the +x axis. What was the magnitude of the acceleration of the spaceship during the 25 seconds?A. 7.3 m/s/sB. 57 m/s/sC. 1.5 m/s/sD. 28 m/s/sE. 48m/s/s2. When the net force that acts on a hockey puck is 12 N, the puck accelerates at a rate of 48 m/s/s determine the mass of the puck.A. 0.25 kg B. 1.0 kgC. 2.5 kgD. 2.0 kgE. 5.0 kg3. A book is resting on the surface of a table. Consider the following four forces that arise in this situation: 1. the force of the earth pulling on the book, 2. the force of the table pushing on the book, 3. the force of the book pushing on the table, 4. the force of the book pulling on the earth. Which two forces form an "action-reaction" pair that obeys Newton's third law?A. 2 and 4B. 1 and 3C. 1 and 4D. 3 and 4E. 1 and 24. The wheels of an automobile are locked as it slides to a stop from an initial speed of 30.0 m/s. If the coefficient of kinetic friction is 0.600 and the road is horizontal, approximately how long does it take the car to stop?A. 5.10 s B. 10.4 sC. 4.22 sD. 15.3 sE. 8.75 s5. A 4-kg block is connected by means of a massless rope to a 2-kg block that is hanging over the edge of a table. The rope is threaded through a pulley that extends out over the edge of the table. Complete the following statement: If the 4-kg block is to begin sliding, the coefficient of static friction between the 4-kg block and the surface must be (don't forget about the inertia of both blocks):A. Greater than 2B. Less than 0.5, but greater than zeroC. Greater than 0.5, but less than 1D. Less than zeroE. Greater than 1, but less than 26. A 71-kg man stands on a bathroom scale in an elevator. What does the scale read if the elevator is ascendingwith an acceleration of 3.0 m/s/s?A. 910 NB. 480 NC. 830 ND. 140 NE. 690 N7. A stone is thrown horizontally from the top of a cliff. One second after it has left you hand its vertical distance below the cliff is A. 10 mB. 5 mC. 15 m8. If the speed of a record player remains constant while your pet hamster moves twice as far from the center, the its linear speedA. HalvesB. Remains the sameC. Doubles 9. Compared to the mass of a certain object on earth, the mass of the same object on the moon isA. MoreB. LessC. The same 10. A block is dragged without acceleration in a straight line path across a level surface by a force of 6 N. What isthe force of friction between the block and the surface?A. Less than 6 NB. Need more information to sayC. More than 6 ND. 6 N 11. A pair of tennis balls fall through the air from a tall building. One ball is regular and the other is filled with lead pellets. The ball to reach the ground first is theA. Regular ballB. Lead Filled C. Same for both12. A Mack truck and a Volkswagon Beetle traveling at the same speed collide head-on. The impact force is greatest on the A. Not enough information is givenB. It’s the same for both C. TruckD. Beetle13. An ordinary workshop grindstone has a radius of 9.50 cm and rotates at 7000.0 rpm. Calculate the centripetal acceleration at its edge in m/s/s and convert it to multiples of g. Answer: 5.21e3 14. A fairground ride spins its occupants inside a flying saucer-snapped container, If the horizontal circular path the riders follow has an 8.00 m radius, at how many revolutions per minute will the riders be subjected to a centripetal acceleration whose magnitude is 1.50 times that due to gravity?Answer: 12.9 rev/min *if answer is wrong enter 14.9 rev/min